a(1)=1, a(2)=2, otherwise a(n) is the sum of the preceding terms a(j), 1<=j<n, where gcd(n,j)=1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =10a(5) =11a(6) =31a(7) =45a(8) =93a(9) =128a(10) =328a(11) =370a(12) =1026a(13) =1461a(14) =2898a(15) =4390a(16) =10801a(17) =12197a(18) =33799a(19) =46082a(20) =96616a(21) =145278a(22) =355574a(23) =401570a(24) =1063600a(25) =1563754a(26) =3226314a(27) =4694447a(28) =11660833a(29) =12062393